78269454 has 24 divisors (see below), whose sum is σ = 169853112. Its totient is φ = 26048400.

The previous prime is 78269453. The next prime is 78269489. The reversal of 78269454 is 45496287.

It is a happy number.

It is a super-2 number, since 2×78269454² = 12252214858916232, which contains 22 as substring.

Its product of digits (483840) is a multiple of the sum of its prime factors (6912).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78269453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9517 + ... + 15719.

It is an arithmetic number, because the mean of its divisors is an integer number (7077213).

Almost surely, 2^78269454 is an apocalyptic number.

78269454 is an abundant number, since it is smaller than the sum of its proper divisors (91583658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78269454 is a wasteful number, since it uses less digits than its factorization.

78269454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6912 (or 6909 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 78269454 is about 8847.0025432346. The cubic root of 78269454 is about 427.7573048328.

Subtracting from 78269454 its sum of digits (45), we obtain a square (78269409 = 8847²).

The spelling of 78269454 in words is "seventy-eight million, two hundred sixty-nine thousand, four hundred fifty-four".